Claims regarding the artificial production of precious materials such as gold (Au), silver (Ag), diamond, and pearl from biological or household precursors are critically examined within the framework of modern atomic theory, thermodynamics, solid-state physics, and nuclear science. Gold (Z = 79) and silver (Z = 47) are elemental species whose identities are strictly determined by nuclear charge; consequently, any transformation yielding these elements requires nuclear-scale processes (MeV energy regime), not chemical or biological reactions (eV scale). We quantitatively demonstrate that conservation of atomic number (ΔZ = 0) in chemical systems prohibits elemental transmutation, thereby invalidating alchemical-style synthesis pathways involving plant extracts, organic matter, or thermal treatment under ambient conditions. In contrast, diamond is identified as a metastable sp³-bonded allotrope of carbon whose synthesis is experimentally validated under extreme conditions, including High Pressure High Temperature (HPHT: 5–10 GPa, 1300–1600 °C) and Chemical Vapor Deposition (CVD: plasma-assisted CH₄ decomposition at ~900 °C and 10–100 Torr). Pearl formation is rigorously characterized as a biologically mediated biomineralization process involving the controlled deposition of aragonitic CaCO₃ within molluskan tissue over multi-year timescales. To unify these distinctions, we introduce the Biological Imitation vs. Elemental Transmutation Boundary (BITEB) principle, a formal conceptual framework that delineates the fundamental limit between atomic rearrangement (ΔZ = 0) and elemental transformation (ΔZ ≠ 0). A comparative feasibility analysis integrating thermodynamic constraints, energy scales, and industrial synthesis pathways is presented to systematically classify material production mechanisms. This study provides a comprehensive, quantitatively grounded framework that resolves longstanding misconceptions regarding “artificial gold” and related materials, while establishing clear scientific boundaries for feasible synthesis. The results have implications for materials science education, scientific communication, and the prevention of pseudoscientific interpretations of chemical and biological processes. Please check the attachment for details